Janna Gertruida Oonk
| Aka: | Gertrude | |
| Sex: | Female | |
| Father: | Hendrik Jan Oonk | |
| Mother: | Janna Gertruid Sikkink | |
| Birth: | 4 Jul 1828 | Winterswijk, GL, NL |
| Death: | 8 Jun 1905 | Clymer, NY, USA |
| Burial: | Clymer Hill Cemetry, Clymer, NY, USA | |
Family 1
| Spouse/Partner: | Wander Damkot | b. (?) d. Bef 1872 |
| Civil: | Bef 1872 |
Family 2
| Spouse/Partner: | Frederik van der Schaaff | b. 27 Jan 1831 d. 29 Jan 1906 |
| Civil: | 12 Nov 1872 | |
| Children: | ||
Frederick VanderSchaaff
 |
b. 29 Aug 1873 d. Sep 1892 | |